DETROIT 5102771 Cylinder Head Magnafluxed Cherry 8V71 Head. Cracks.

( Brand: Detroit ), ( Manufacturer Part Number: 5102771 ), ( Type: Cylinder Head ), ( Material: Cast Iron )

Review DETROIT 8v71 Bare Cylinder Head. Magnafluxed no Cracks. Cherry Head

The **Detroit Diesel 5102771 8V71 Bare Cylinder Head (Magnafluxed No Cherry)** is a high-performance, precision-engineered component designed specifically for Detroit Diesel Series 60 and 92 engines, offering a robust solution for rebuilds, upgrades, or replacements where maximum reliability and durability are paramount. This bare cylinder head is crafted from high-grade cast iron, ensuring exceptional strength and resistance to thermal stress, which is critical for heavy-duty diesel applications. The **8V71 designation** indicates its compatibility with the 8-valve cylinder head configuration, featuring a single overhead camshaft (SOHC) design that drives the intake and exhaust valves through rocker arms, delivering efficient airflow and combustion. The head has undergone rigorous **Magnaflux testing**, a non-destructive inspection method that detects surface and subsurface cracks or imperfections, guaranteeing structural integrity before installation. Unlike "cherry" (new) heads, this used-but-tested component offers cost savings without compromising quality, as it has been thoroughly inspected and cleaned of old gaskets, seals, and residual materials, leaving it ready for reassembly with fresh components. Ideal for mechanics and fleet operators seeking a balance between performance and affordability, this cylinder head is a trusted choice for restoring or upgrading Detroit Diesel engines to peak operating condition, ensuring longevity and optimal power output in demanding industrial, marine, or trucking applications.

### **Pros and Cons of Buying a Used Detroit Diesel 5102771 8V71 Bare Cylinder Head (Magnafluxed, No Cherry)**

1. **Cost-Effective Alternative** A bare cylinder head is significantly cheaper than a fully rebuilt or new head, making it a budget-friendly option for repairs or modifications.

2. **Magnafluxed for Inspection** The head has been Magnafluxed, which means it has undergone a non-destructive testing process to check for cracks or defects. This adds some assurance that the head is structurally sound before purchase.

3. **Potential for Customization** Since it s bare, you can inspect it thoroughly, clean it, and even modify it (e.g., porting, valve job) if needed before installation.

4. **Compatibility with Existing Engines** The 8V71 head is designed for Detroit Diesel 6V71, 8V71, and related engines, so it should fit if your engine uses this configuration.

5. **No Cherry (No Valvetrain Included)** If you already have a used or refurbished valvetrain (camshaft, lifters, valves, etc.), you can pair it with this head, reducing overall costs.

6. **Parts Availability** Detroit Diesel parts are still widely available, though some older components may require sourcing from specialty suppliers.

1. **No Warranty or Guarantee** Since it s a used, bare head, there is no warranty or return policy. If it has hidden damage (e.g., internal cracks, warping, or wear), you ll be responsible for the cost of replacement.

2. **Risk of Hidden Damage** Even though it s Magnafluxed, Magnafluxing only detects surface cracks. Internal issues like warping, worn valve seats, or exhaust port erosion may not be visible without further inspection.

3. **No Valvetrain Included** You ll need to source a compatible camshaft, lifters, valves, and retainers separately, adding to labor and parts costs.

4. **Potential for Wear** If the head has been used, it may have uneven wear on the combustion chamber, valve guides, or seat surfaces, requiring additional machining or replacement parts.

5. **Installation Challenges** Installing a bare head requires proper gasket sealing, torque specifications, and alignment with the block. Improper installation can lead to leaks or performance issues.

6. **Limited Longevity** Unless thoroughly inspected and refurbished, a used head may not last as long as a new or fully rebuilt one, potentially leading to future failures.

7. **Compatibility Risks** If the head was pulled from a different engine (e.g., a high-mileage truck), it may not match your engine s specifications, leading to poor performance or damage.

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Buying a used Detroit 5102771 8V71 bare cylinder head can be a cost-effective solution if you re on a tight budget and willing to take on the risk. The Magnafluxing is a plus, but it doesn t guarantee the head is flawless. If you re experienced with engine work, inspect it thoroughly (look for warping, cracks, and wear), and have a backup plan for parts, it could be a viable option. However, if you want reliability and peace of mind, a rebuilt or new head from a trusted supplier may be worth the higher cost.

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- **If you re confident in your mechanical skills and have the time to inspect, clean, and refurbish the head**, purchasing this used bare head could save money, especially if you already have a valvetrain.

- **If you re unsure about the head s condition or lack experience with engine work**, consider buying a **rebuilt or new head from a reputable dealer** to avoid potential future issues.

- **Always verify the head s history** (e.g., was it from a failed engine due to head failure, or was it pulled for routine maintenance?).

- **Get a second opinion** from a trusted mechanic before committing, especially if the head shows signs of wear or damage.

- **Budget for additional costs** (gaskets, torque wrench, cleaning supplies, and potential machining if needed).

Ultimately, the decision depends on your budget, experience, and risk tolerance. For most DIYers, a used bare head is a gamble weigh the savings against the potential for costly mistakes.

Details:

Head has been magnafluxed no cracks-no welds. Thick Cherry head for reconditioning. Head has been hot tanked and steam cleaned. Message me with any questions.

Head can only be used on a 8v71 engine. No removable water plates for manifold. CAN NOT BE USED ON A 4-71.

part #: 5102771 prices

• $775.00-$1900.00

specifications cylinderheapar:

• brand: Detroit
• mpn: 5102771
• type: Cylinder Head
• material: Cast Iron

seller cylinderheapar:

• # reviews: 375
• city: Riverside, California
• rating: 100.0%

payments cylinderheapar:

• other
• credit card: Discover
• wallet: Apple-pay

general cylinderheapar:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

shipping cylinderheapar:

• cost: $217.80
• type: Calculated
• class: Standard
• service: UPS Ground
• carrier: UPS
• transit: 3-8 Days

offer cylinderheapar:

• quantity: 2
• availability: In Stock
• sold: 0
• started: April 27, 2026
• best offers: True
• options: Ship-to-home

returns cylinderheapar:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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